What calculation represents the percentage of code statements executed by at least one test?

The calculation that represents the percentage of code statements executed by at least one test is known as Code Coverage. This metric is essential in the realm of software testing because it helps evaluate the effectiveness of tests in exercising the codebase. By determining how much of the code has been executed during testing, Code Coverage provides insights into areas of the application that might require additional tests to ensure they are functioning as expected.

Specifically, Code Coverage identifies which lines or statements of code have been executed, allowing testers to see if there are any parts of the application that are untested. This is crucial for identifying potential risks and ensuring that the software behaves correctly in various scenarios.

While other options such as Statement Coverage relate to testing code execution, they are subsets of Code Coverage. Statement Coverage, for example, focuses specifically on whether individual statements have been executed, but it does not provide the broader picture that Code Coverage does. Decision Coverage assesses whether all decision points have been executed, which is another specific aspect. Error Guessing is a technique used to anticipate potential defects, rather than a measurement of code coverage. Thus, Code Coverage serves as the overarching calculation that encompasses these concepts effectively.